hello,
You're doing quite well for a beginner.
For #1, you should have tried to shot from lower to have a different perspective.
#2, too much blown hightlights to me. Shooting in full sun is very tricky! Look for shade.
#3, I like it. You shoudl have tried a close up on the face with a low aperture or portrait mode.
The ones of the kids are not bad but a lots of hightlights.
Make sure you focus on the eyes.
Good luck for next time, you're doing great!!!